burst of insight

Translations
вспышка прозрения
After hours of puzzling over the problem, he suddenly had a burst of insight.
После нескольких часов раздумий над проблемой, он внезапно испытал вспышку прозрения.
Definitions
A sudden and clear understanding or realization about something, often leading to a new perspective or solution to a problem.
Words
burst

noun
взрыв
insight

noun
понимание